In Sahrmann test stage 3, which action describes the movement?

In Sahrmann test stage 3, which action describes the movement?

• A. One foot is slowly lowered to tap the floor and returned to tabletop while pressure remains constant.
• B. Both legs are lowered together to the floor.
• C. One leg is lifted to the tabletop while the other remains on the floor.
• D. The pelvis is rotated while the trunk remains still.

Answer: (A)

Stage 3 focuses on refined control of the deep abdominal muscles and pelvic stability while a limb moves, with the spine kept braced and neutral. The movement described involves slowly lowering one leg from tabletop toward the floor and then returning it to tabletop, all while maintaining a constant abdominal pressure. This pattern directly tests the ability to brace the core and prevent trunk motion as the limb changes position, which is the skill being evaluated at this stage. Lowering both legs together would spread the demand and recruit different strategies, so it doesn’t isolate the same stability control. Lifting a leg to the tabletop emphasizes a different direction of movement rather than the controlled lowering and stabilization during unilateral leg movement. Rotating the pelvis while the trunk stays still introduces a compensatory movement not aligned with maintaining neutral pelvis and spine during the test.

Stage 3 focuses on refined control of the deep abdominal muscles and pelvic stability while a limb moves, with the spine kept braced and neutral. The movement described involves slowly lowering one leg from tabletop toward the floor and then returning it to tabletop, all while maintaining a constant abdominal pressure. This pattern directly tests the ability to brace the core and prevent trunk motion as the limb changes position, which is the skill being evaluated at this stage.

Lowering both legs together would spread the demand and recruit different strategies, so it doesn’t isolate the same stability control. Lifting a leg to the tabletop emphasizes a different direction of movement rather than the controlled lowering and stabilization during unilateral leg movement. Rotating the pelvis while the trunk stays still introduces a compensatory movement not aligned with maintaining neutral pelvis and spine during the test.